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纤维增强聚合物(FRP)具有耐腐蚀、耐水、耐高温、高强度、高弹性模量、质量轻等优点,将其用作加筋材料不仅能显著提高加筋地基的加筋效果,还能有效解决传统加筋材料的耐久性问题。分别对纯砂和5种水平加筋方式进行了加筋地基模型试验,测试了各级荷载下的地基沉降、FRP的应变及土压力数值,并初步探讨了FRP加筋的作用机制。试验结果表明,加筋能显著提高地基承载力和减小地基沉降,特别是双层水平加筋方式的加筋效果更加明显,而锚固件的设置对加筋效果的影响并不大,水平FRP筋材主要起到了土压力扩散作用。
Fiber reinforced polymer (FRP) has the advantages of corrosion resistance, water resistance, high temperature resistance, high strength, high elastic modulus and light weight. It can not only improve the reinforcing effect of reinforced foundation significantly, Effectively solve the durability problems of traditional reinforced materials. Reinforced foundation model tests were conducted on pure sand and five kinds of horizontal reinforcement methods respectively. The settlement of foundation, the strain of FRP and the earth pressure under various loads were tested. The mechanism of FRP reinforcement was also discussed. The test results show that the reinforcement can significantly improve the bearing capacity of the foundation and reduce the settlement of the foundation, especially the reinforcement effect of the double-layer horizontal reinforcement is more obvious. However, the anchor has little effect on the reinforcement effect. The horizontal FRP Rebar played a major role in the diffusion of earth pressure.